<template>
  <div>
       <!-- 面包屑区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
        <el-row>
          <el-col>
            <el-button type="primary" @click="showAddRoleslog">添加角色</el-button>
          </el-col>
        </el-row>
        <el-table :data="rolesList" border stripe row-key="id">
          <!-- 展开列 -->
          <el-table-column type="expand" label="展开">
            <template slot-scope="scope">
              <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                <el-col :span="19">
                  <!-- 通过for循环 嵌套渲染二级列表 -->
                  <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type='success' closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
                        {{item3.authName}}
                      </el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
              <!-- <pre>
                {{scope.row}}
              </pre> -->
            </template>
          </el-table-column>
          <!-- 索引列 -->
          <el-table-column type="index" label="序列"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
              <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRolesById(scope.row.id)">删除</el-button>
              <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
    </el-card> 
    <!-- 分配权限对话框 -->
      <el-dialog
        title="分配权限"
        :visible.sync="SetRightDialogVisible"
        width="50%" @close="SetRightDialogClosed">
        <!-- 树形控件 -->
        <el-tree :data="rightList" :props="treeProps" @node-click="handleNodeClick" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="SetRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        // 获取角色列表
        rolesList: [],
        // 控制显示与隐藏的对话框
        SetRightDialogVisible: false,
        // 所有权限的数据
        rightList: [],
        // 树形控件树形绑定事件
        treeProps: {
            label: 'authName',
            children: 'children'
        },
        //默认选中的节点数组
        defKeys: [],
        // 当前即将分配权限的id
        roleId: ''
      }
    },
    created() {
      // 获取所有角色列表
      this.getRolesList()
    },
    methods: {
      // 获取角色列表
     async getRolesList() {
        const {data: res} = await this.$http.get('roles')
        // console.log(res);
        if(res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败!')
        }
        // this.$message.success('获取角色列表成功!')
        // 重新获取列表角色数据
        this.rolesList = res.data
        // console.log(this.rolesList);
      },
       // 根据id删除对应的id
      async removeRolesById(id) {
        //  console.log(id);
        // 弹框提示询问用户是否删除信息
       const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
         
        // console.log(confirmResult);
        if(confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        // console.log('确认了删除');
        const {data: res} = await this.$http.delete('roles/' + id)
          if(res.meta.status !== 200) {
            this.$message.error('删除用户失败!')
          } 
          this.$message.success('删除用户成功!')
          // 重新获取用户类表数据
          this.getRolesList()
       },
       // 根据id删除对应的id
       async removeRightById(role, rightId) {
        //  console.log(id);
       const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

         if(confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        // console.log('确认了删除');
        const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
          if(res.meta.status !== 200) {
            this.$message.error('删除权限失败!')
          } 
          // this.$message.success('删除权限成功!')
          // 重新获取权限类表数据
          // this.getRolesList()
          role.children = res.data
       },
       // 展示分配权限的对话框
      async showSetRightDialog(role) { 
        this.roleId = role.id
         // 获取所有权限的数据        
          const {data: res} = await this.$http.get('rights/tree')
          if(res.meta.status !== 200) {
           return this.$message.error('获取权限数据失败!')
          } 
          // 把获取到的权限数据保存到data中
          this.rightList = res.data 
          // console.log(this.rightList);
            // 递归获取三级节点的id
          this.getleafKeys(role, this.defKeys)     
          this.SetRightDialogVisible = true
       },
      // 树形控件
      handleNodeClick(data) {
          // console.log(data);
          
      },
      // 通过递归的形式 获取角色下所有的三级的权限的id 并保存到defKeys数组中
      getleafKeys(node, arr) {
        // 如果当前节点不包含 children属性 则是三级节点
          if(!node.children) {
            return arr.push(node.id)
          }
          node.children.forEach(item => this.getleafKeys(item, arr))
      },
      // 监听分配对话框的关闭事件
      SetRightDialogClosed() {
        this.defKeys = []
      },
      // 点击为角色分配权限
    async  allotRights() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
          
        ]
        // console.log(keys);
        const idStr = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
      if(res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      } 
      // 把获取到的权限数据保存到data中
      this.getRolesList()
      this.SetRightDialogVisible = false
      },
      // 添加角色
      showAddRoleslog() {
        alert('调用成功')
        this.getRolesList()    
        
      }
    }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
